Search-light apparatus



G. DALEN.

SEARCH LIGHT APPARATUS. APPLICATION FILED .\AN.23,19\7y Patented Aug. 24, 1920.

ullrnlllnll Inval/ln.: l u n u I Il l/l/ GUSTAF DALN, oFk LIDYINGN, srocKH AKTIEBOLAGET GASSACCUMUL PATENT CFFICE.

OLM, SWEDEN, ASSIGNOR T SVENSiKA I ATOR, 0F STOCKHOLM, SWEDEN.

SEARCH-LIGHT APPARATUS.

Specification of Letters Patent.

Patented Aug. 24, 1920.

Application med Jamiaryzs, 1917. serial No. 143,948.

To all 'whom t may conce/rn: A

Be it known that I, Gns'rnr DALN, engineer, residing at Slrarsatra, Lidingn, Stockholm, Sweden, have invented certain new and useful Improvements in Search-Light Apparatus, of which the following is a speci- Y extinguished, is obviated ,fromv being iication. y

VThe present invention refers to certain improvements in search light apparatus, vin which the source of light is in the form of an incandescent bodyheated by means of gas or an electric are lamp or incandescent lamp. The invention has for its object means whereby vthe continued glowing of the source of light, after this latterhas been perceptible outside of the search light apparatus. This is an important condition vespecially when using search llight for military purposes. tion consists of a screening device, which au! tomatically enters into action when the source of light is extinguished and. lighted, insuch a manner, that the source of light is automatically screened,when the source of light is extinguished, whereas the screening device or part` of automatically isi dis` placed in such a position, when the source i of vlight is lighted, that it intercepts the light rays reflected by the search light apparatus in thel smallest movable part of it is operated by the fluid, such as gas or electricity, feeding the source of light. lVhen gas is employed the screening device or the-movable part of it preferably is operated, by a diaphragm, exposed to the pressure of the gas employed, whereby the move- Y ment of the screening device in one direction may be effected .byj means of a spring if required. Y

The lscreening device preferably is arranged in such a manner, that it closely surrounds the source of light in its screening position, whereby the 'dimensionsv of the deviceare made small, and the movable part of the same is easily handled, and intercepts but very little light in the position occupied when the source of light is lighted- On the accompanying drawing Figure 1 is a vertical section of one construction according to the invention, showing part of a search light apparatus, in which a movable part of the screening device is operated by The essential feature of the invenV possible degree. For this purpose the screening devlce or the aY gas actuated diaphragm. Fig. 2 is a horizontal section on line A-B in Fig. 1. Fig. 3 is a vertical section on line C-D in Fig. 1.

With reference to Figs. 1-3 1 indicates part of the casing of the search light apparatus, and 2 the reflector. As the source of light an incandescent body 3 is provided, which is heated by the flame of a gas burner 4. Gas or a gas mixture, such as oxy-acetylene gas, is fed to the burner 4 through the conduit 5 from a mixing chamber 6, to which the gases are introduced through channels 7, 8, in a standard 9 secured to the casing 1. r1`he screening device according to the construction lillustrated consists partly of a fixed screen 10, supported by the standard 9, and having mainly half cylindrical form,

is introduced from the channel 8 through the channel 15. Any suitable transmission may be provided for transferring the movement of the diaphragm 13 to thescreen 11 vor to the sleeve 12, carrying the same. On the drawing said transmission consists of a gear segment 16 on the sleeve 12 and a gear segment 17 on an Aarm 18, secured to an oscillating shaft 19, connected with the diaphragm 13 by means of a bar 20 andan arm 21 on the shaft 19. The arrangement is such, that on introducing gas through the channel 8 for .lighting the fiame of the burner 4L, gas simultaneously is introduced to the casing 14 and to the diaphragm 13, whereby the screen 11 is movedv half a revolution, so that the y casing, formed by the two screens 10 and 11 in closed position, is opened and the rays of light from thevflame orthe incandescent body 3 strike the reflector 2 for being para-llelized bythe same. p through the channel 8 is cut ofi", the screen 11 is moved back to its original position by the action of the spring 22, so that a practically closed casing is established by the two parts of the screening device.

The gas channels 7 and 8 are connected by means of flexible tubes 23, 24:, with gas receivers, not shown on the drawing. Valves 25, 26 may be provided outside of the Search When the flow of gas 'controlling the flowl of light apparatus, Vii' required, at a distance from saidl apparatus, so that the screen can be handled from a distant place.

In the construction shown the holder 2f?? of the incandescent; body 3 is li-Xed to the screen l0, Which is movable on theY bolt 28,

so that the screen can be turned doivn for' inspection or exchange of the incandescent body, The screennll is also movable by.

hand and can' be secured in an open position against the action of the spring 22 by means of the screw 29. y

In7 the' construction shown' the movable screen '11 isv oscillating around the fixed.,4

screen 10.

Having thus described my invention,

what I cla-im is:

1.1A search light apparatus, comprising combination a..source'oilight, a screen de vice comprising a inedvmember and a ro. tary member, a'c'ond'uitior conveying anV illuminating: medium to said source of lightl means Yfor controlling the flow of illuminat-l I ing medium, andmeans directly connected with" said conduit and actuated by the' illuminating medium flowing therein,| for moving the rotary member' out of screenin'gf position when said medium commencesfto, flow and means Jorm'oving the rotary mem-V ber back intoV screening. position when the' medium ceases tov flow in said conduit, forV the purpose set forth.

vsearchv light apparatus, comprising in combination a source oi' light, a'V screen der-,

and means connectedivith said diaphragm ormoving the rotary member out of screening'position when-the gas commences to low and"me'ans for' moving'the rotary member back into screening position When' t'he'gas ceases to v,flow in said conduit tor theipuri v. pose' set. forth'.

31 Al search light apparatus, comprising in combination a source'of light, a screen, de, Vvice comprising a fixed member' and' a rotary member forming' togetherV a Y hollow cylindrical/casing, a conduit for conveyingan illun'ii'nating mediifim to said sou'rce of light, means J'or controlling thelow of'illuminating mediu'm,`1means directly connectedfvvith saideonduit and actuated'by Vthe mediumf flowing therein for" moving therotar'y memoi the said arm.

berV out of screening position YWhenthe me dium' commences to flow and means for moving said rotary member vback into screening position when the medium ceases tov flow in said conduit, means for moving. the rotary member by hand and means for locking said rotai'g member in its non-screening position.

4. search light apparatus, comprising in combination a source of light, a screen de; vice comprisinga fixed member and a rotar'yfm'ember, a conduit for conveying a supply of gas to the source of light, means for. controlling the flow of gas,"'a diaphragm casing in direct communication with said conduit, a diaphragm Within saidl casing, a shaft oscillatedv by the movements of said diaphragm, an arm fixed on said shaft, a gear segment support by said arm, arrotatable sleeve carrying the said rotary meinber, and a gear segment mounted on said sleeve and meshing with the gear Vsegment 5. A search light apparatus, comprising in combination a gas burner, a screen device consistingoi a semicylindricalfixed member and a semi-cylindrical,rotarymember, means'operated by the gas feeding said burner, whereby the'screen is kept out of screening position as long as the light is' burning, and' a spring for keeping the screen in screening position as long as the light is extin uished. L Y

6; search light apparatus comprising in combination a gas burner, a screen device consisting of a fxedrmember and a rotary member, means operated by the gas feeding the burner, whereby, the screen is kept out of screening position, as long as they light is burning,'an`d a springfor actuating the rotary Vmemberv of the screen., so as toA keep it'in screeningV position as long as the light is extinguished. Y l' n 7'. A search light apparatus comprising in combination a gas burner, aY screen device comprising a liXed member andra rotary member, an incandescent body earriedby;

said fixed' member, a standard Jfor carrying the screen devicel and meansv Vfor joining'the said fixed? member to the standard so as to allow extraction of the' incandescentv body.

In testimony Whereof'I' have signed my* name to'l this speciiic'ation in the presence of two subscribing Witnesses.

' 'GUSTAF IDA-LEN.

Witnesses:

WALDEM'AR BOMAN', ELiN WAHMAN. 

